Snapshot creation method and device and electronic equipment

The embodiment of the invention provides a snapshot creation method and device and electronic equipment. The method comprises the steps of determining at least one to-be-backed-up data block in data blocks according to metadata of a target object; selecting a to-be-backed-up data block meeting a preset condition from the at least one to-be-backed-up data block, and sending the to-be-backed-up datablock as a preliminary data block to a snapshot storage system for storage; after a snapshot creation instruction used for instructing snapshot creation is received, marking status bits of to-be-backed-up data blocks, except the preliminary data block, in the at least one to-be-backed-up data block as to-be-backed-up status; and sending the to-be-backed-up data block marked as the to-be-backed-upstate to a snapshot storage system for storage. According to the embodiment of the invention, the modified data blocks to be backed up are divided, and part of the data blocks are selected from the data blocks to be backed up